[HGI-News] HGI-Seminar am Montag, 8.12.2003

[hgi-news at lists.ruhr-uni-bochum.de]

========================================================================
	

			 Ammar Alkassar
		Department for Computer Science
		  Universität des Saarlandes


		Montag, 08.12.2003, 13:00 st, IC 4/39

"Secure Object Identification - Or: How To Solve The
Chess-Grandmaster-Problem"

Many applications of cryptographic identification protocols are  vulnerable
against physical adversaries who perform real time attacks.  For instance,
when identifying a physical object like an automated  teller machine, common

identification schemes can be bypassed by  faithfully relaying all messages 
between the communicating participants.  This attack is known as mafia
fraud. 

In my talk I will give an overview over different approaches to cope  with
that fraud. One approach, the Probabilistic Channel Hopping system,  solves
this problem by hiding the conversation channel between the  participants. 
The security of this approach is based on the assumption  that an adversary
cannot efficiently relay all possible communication  channels of the PCH 
system in parallel.  


========================================================================

EMAIL-VERTEILER: Wenn Sie Vortragsankündigungen auch in Zukunft per
Email erhalten wollen, können Sie hier
http://www.hgi.ruhr-uni-bochum.de/newsletter/
unseren Newsletter abonnieren.

ANFAHRT: Eine Wegbeschreibung zur RUB ist hier zu finden:
http://www.ruhr-uni-bochum.de/pressestelle/anreise.htm

========================================================================


Sandeep Kumar
Chair for Communication Security
Dept. of Electr. Eng. & Information Sciences
Ruhr-University Bochum
44780 Bochum, Germany

URL: www.crypto.rub.de

_______________________________________________
HGI-News mailing list

Informationen unter:
http://lists.ruhr-uni-bochum.de/mailman/listinfo/hgi-news